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<?php |
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declare(strict_types = 1); |
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namespace Innmind\AMQP\Transport\Connection; |
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use Innmind\AMQP\{ |
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Transport\Protocol, |
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Transport\Frame, |
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Transport\Frame\Method, |
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Transport\Frame\Type, |
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Transport\Frame\Channel, |
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Transport\Frame\Value\UnsignedOctet, |
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Transport\Frame\Value\UnsignedShortInteger, |
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Transport\Frame\Value\UnsignedLongInteger, |
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Exception\ReceivedFrameNotDelimitedCorrectly, |
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Exception\PayloadTooShort, |
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Exception\UnknownFrameType, |
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Exception\NoFrameDetected, |
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Exception\LogicException |
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}; |
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use Innmind\Stream\Readable; |
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final class FrameReader |
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{ |
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public function __invoke(Readable $stream, Protocol $protocol): Frame |
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{ |
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$octet = $stream->read(1); |
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try { |
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$type = Type::fromInt( |
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UnsignedOctet::fromString($octet)->original()->value() |
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); |
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2 |
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} catch (UnknownFrameType $e) { |
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throw new NoFrameDetected($octet->append((string) $stream->read())); |
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} |
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$channel = new Channel( |
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UnsignedShortInteger::fromString($stream->read(2))->original()->value() |
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); |
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$payload = $stream |
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->read(UnsignedLongInteger::fromString($stream->read(4))->original()->value()) |
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->toEncoding('ASCII'); |
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if ( |
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( |
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$type === Type::method() || |
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$type === Type::header() |
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) && |
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$payload->length() < 4 |
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) { |
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throw new PayloadTooShort; |
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} |
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$end = $stream->read(1)->toEncoding('ASCII'); |
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if ($end->length() !== 1) { |
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throw new ReceivedFrameNotDelimitedCorrectly; |
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} |
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$end = UnsignedOctet::fromString($end)->original()->value(); |
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if ($end !== 0xCE) { |
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throw new ReceivedFrameNotDelimitedCorrectly; |
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} |
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switch ($type) { |
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case Type::method(): |
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$method = $payload->substring(0, 4); |
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$method = new Method( |
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UnsignedShortInteger::fromString($method->substring(0, 2)) |
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->original() |
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->value(), |
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UnsignedShortInteger::fromString($method->substring(2, 4)) |
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->original() |
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->value() |
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); |
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$arguments = $payload->substring(4); |
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return Frame::command( |
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$channel, |
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$method, |
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...$protocol->read($method, $arguments) |
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); |
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case Type::header(): |
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$header = $payload->substring(0, 4); //3 and 4 are the weight |
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$class = UnsignedShortInteger::fromString($header->substring(0, 2)) |
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->original() |
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->value(); |
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return Frame::header( |
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$channel, |
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$class, |
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...$protocol->readHeader($payload->substring(4)) |
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); |
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case Type::body(): |
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return Frame::body($channel, $payload); |
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1 |
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case Type::heartbeat(): |
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1 |
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return Frame::heartbeat(); |
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default: |
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throw new LogicException; //if reached then there's an implementation error |
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} |
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} |
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} |
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Innmind /
AMQP
